High Power Combiners are commonly supplied in a 7x1 or a 19x1 geometric configuration. N+1x1 products from Optace include state-of-the-art 6+1x1 and 18+1x1 high power combiners with single mode (SM) or polarisation maintaining (PM) fibre feed through. Optace also manufacture combiners featuring large mode area (LMA) feed-through. All multimode fibre combiners from Optace can be supplied with up to 19 input fibres and with larger diameter 220um input and 400um output fibres. Long-term high power operation has been verified with over 50, 000 device test hours.